Selp-ltjbbicating spring



I. N. WISE.

S'LLF LUBRICATING SPRING.'

@Pme/111011 man FEB.11,1919. 1,825,413 1 Patented Dec. 16, 1919.

WMM/wonen wat m To all whom it may concern? zen of the United States,residing at Yazoo' UNITED sTATEs PATENT oEEIoE.

ISAAC N. WISE, 0F YAZOO CITY, MISSISSIPPI.

i SELF-LUBRICATING SPRING.

Be it known that I, IsAAo N. W'Isn, a citi- City, in the county of Yazooand State of Mississippi, have invented new and usefulv Improvements inSelf-Lubricatin Springs, of which the followingis a speci cation.

This invention relates to certain novel and useful improvements in selflubricating springs and has particular application to a self lubricatingleaf spring structure for vehiclesf'- f l In "carrying out the resentinvention it is my purpose to-provi e a self lubricating leaf springstructure wherein the individual leaves will be so formed that a supplyof oil or other lubricant may traverse the spring structure between theindividual leaves thereof thereby enabling the structure to bethoroughly and efficiently lubricated at all times. V

Another object of my invention is the provision of a self lubricatingstructure of the class described which will embrace the desired featuresof simplicity, eficiency and durability, which may be manufactured' at asmall cost and which will be self lubricating under all conditions. v

With the above recited objects in view and others of a similar nature,the invention resides in the construction, combination and arrangementof parts, set forth in and falling within the scope of the appendedclaim.

In the accompanying drawing:-

Figure 1 is a view in side elevation of the upper section of a leafspring structure constructed in accordance with my present invention. p

Fig. 2-is a bottom plan view of one of the leaves.

Fig. 3 is a longitudinal sectional vie through the spring structure.

In the present instance, I have shown my invention as applied to theupper section of a leaf spring structure and in this connection it willbe understood that my invention is equally applicable to the lowersection of the spring structure and is, in fact, capable of use in anytype of leaf spring structure.l

Referring now to the drawing. in detail, the numeral 1 designates theindividual leaves of* the upper section of a leaf spring structure, 'Asusual, these leaves are placed Speeieation of Letters Patent. PatentedDec, 16, 1919, Application mea February 11, 1919. serial No. 276,288.

one upon' the other, in face to face contact and secured together bymeans of clips 2 that hold the leaves against accidental relativemovement laterally. In accordance with my invention the lower side ofeach leaf l of the spring is formed witha longitudinal channel 3 whichterminates short of the respective ends of the leaf. Each leaf is alsoformed with openings 4 suitably spaced apart and opening onto the lowerside of the next adjacent leaf above the particular leaf. The openings 4inthe top leaf of the spring carry oil cups awhich may be threaded orotherwise secured in the respective openings. The bottom leaf of thespring structure is not formed with openings 4; but

--dividual leaves of the spring will be thoroughly and efficientlylubricated so that when excessive strain is placed thereon the' leavesmay have the necessary relative movementto one another to take up theshock or f rebound. At, the same time, 'my improved self lubricatingspring structure will outlive the usual spring structure for the reasonthat the individual leaves are thoroughly lubricated under allconditions thereby preventing rusting of the leaves and consequentdeterioriation thereof.

I claim A self lubricating spring'A structure comprising a plurality ofsuperposed leaves, the

bottom leaf being continuous and each of the remaining leavesbeing-.provided in its underside with a single central longitudinalgroove terminating short of the ends of theleaf, each leaf being furtherprovided in the groove with a series of circular holes, the topmost leafhavin g only two holes,lthe holes in the successive leaves being instaggered relation, and oil cups threaded into the holes in the topmostleaf.

In testimony whereof I aiiix my signature.

ISAAC N, WISE.

